*Bayonet – Can attach a short sword to this weapon, and it can then be used in melee with short sword properties. It obviously remains a two handed weapon though, not an offhand.
Rogues can treat Firearms as Crossbows for the purpose of rogue attack powers, sneak attacks, rogue weapon talent, etc.
Unless a class can use all military ranged weapons, they do not have profficiency with any kind of firearm.

New Feats

Feat Name

Feat Description

Heroic Tier

Weapon Focus/Expertise

As with every weapon ever

Mechanical Empathy

Warforged get proficiency with military firearms and a +2 to damage rolls with any weapon with the Firearm property

Quick Draw

Can draw a gun as part of the action to fire it, if an adjacent enemy is included in the attack, ranged and area attacks made with a firearm don’t take OA from that enemy.

Steady arm

Can use Con instead of Dex for ranged basic attacks made with firearms.

Paragon Tier

Patient Sniper

Gain a +1 to attack rolls with firearms, and treat them as high crit weapons if you haven’t moved since the end of your last turn

Gunslinger

Handgun becomes a +3 proficiency weapon and can be used offhand.

Epic Tier

Firearm Mastery

When using a firearm you can score a critical hit on a roll of 19 or 20.